In other words

https://www.techrepublic.com/forum/discussions/103-340623-3412123

Apparently 'Take Offline' spawns a new discussion, as was previously discussed. It defaults to the subject of the post one was viewing when one selected the option. Disappointingly, it does not link back to the spawning discussion or post, and there doesn't appear to be a way back to the original content.

If I manually navigate back to the original post, I see a new link beneath it. The "This discussion has been taken to the Water Cooler" link takes you to this new discussion. Apparently you can go from the parent discussion to the child, but not the other way around.

EDITED - A-ha! If you click the link at the top of the spawned discussion, the one with the auto-entered name of the parent post, it will take you back to that originating post.